/*
 *  Copyright 2013 National Institute of Advanced Industrial Science and Technology
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.sss.mapreduce.example;

import org.sss.client.JobEngine;
import org.sss.client.SssClient;
import org.sss.mapreduce.GroupID;

public class IdentityMapRunner {
  /**
   * Usage:
   * java IdentityMapRunner groupID
   */
  public static void main(String[] args) throws Exception {
    SssClient client = new SssClient(args);
    String[] others = client.getArgs();
    GroupID input = null;
    if (others.length < 1) {
      System.err.println("input group id is not specified.");
      System.exit(-1);
    }
    else if (others.length > 1) {
      System.err.println("too many arguments.");
      System.exit(-1);
    }
    else {                      // others.length == 1
      input = GroupID.createFromString(others[0]);
    }
    JobEngine engine = new JobEngine(client);
    try {
      GroupID co = GroupID.createRandom(client);
      engine.getJobBuilder("jobIMR", IdentityMapperOnByteArray.class)
        .addInput("input", input).addOutput("output", co).build();
      engine.exec();
      System.out.println(co);
    } finally {
      engine.close();
    }
  }
}
